An electric support device

Abstract

This invention discloses an electric support device, comprising a rotatably connected base frame and a support frame. The base frame has a groove, and a first slider is slidably fitted within the groove. An electric drive mechanism drives the first slider to reciprocate. A support assembly includes a support rod and a guide block. The first end of the support rod is rotatably connected to the first slider, and the second end of the support rod is connected to a pusher that contacts the back of the support frame. The guide block has a guide surface. An assist assembly includes a second slider and at least one rotating joint. The first end of the rotating joint is rotatably connected to the pusher, and the second end of the rotating joint is rotatably connected to the second slider. When the pusher is raised to a first position, the second slider is stopped at its limit position. As the pusher continues to rise, the rotating joint provides assistance to the support frame. In its initial folded state, this electric support device is thin, small in size, and compact in structure. In its unfolded state, it provides assisted support, has a large load capacity, and good support stability.

Description

Technical Field

[0001] This application relates to the field of electric furniture technology, specifically to an electric support device. Background Technology

[0002] Electric beds, with their adjustable postures (lying down, sitting, etc.), can alleviate fatigue and are therefore very popular. To enable ordinary beds to also offer adjustable features, an electric support device, also known as a backrest bed frame, is installed under the mattress. This is a separately configured component; users simply place the device on the bed frame under the mattress and adjust its height to adjust the height of the softer mattress above it, thus giving the ordinary bed mattress height adjustment capabilities.

[0003] The electrically powered support device of this related technology includes a fixed frame and a backrest support. One end of the backrest support is rotatably connected to one end of the fixed frame via a rotating shaft. The fixed frame is placed horizontally on the bed frame of a regular bed, and the backrest support can rotate relative to the fixed frame around the rotating shaft, allowing the height of the backrest support to be adjusted between an initial folded state and a final unfolded state. The electrically powered support device of this related technology also includes an electric push rod disposed between the fixed frame and the backrest support. One end of the electric push rod is hinged to the fixed frame, and the other end of the electric push rod is hinged to the backrest support, used to drive the rotation of the backrest support and support the load-bearing capacity of the backrest support, such as the backrest bed frame in the applicant's earlier application with publication number CN115500645A.

[0004] The electrically operated support device of the related technology has the following defects in actual use: First, in order to ensure that the electric push rod can provide sufficient lift to the backrest support when it is unfolded from the initial folded state, the electric push rod is tilted when the backrest support is in the initial folded state, or / and the backrest support is tilted relative to the fixed frame when it is in the initial folded state. Therefore, the support device is thick, bulky, and not compact after folding, which increases packaging and transportation costs. Second, when the backrest support is unfolded under load, the rotational force of the backrest support is converted solely by the axial thrust of the electric push rod. Therefore, the load capacity of the support device of the related technology is too small. In addition, after the backrest support is unfolded, the support of the backrest support is entirely provided by the self-locking force of the electric push rod, resulting in poor support stability. Summary of the Invention

[0005] The technical problem to be solved by this application is to overcome the defects of the above-mentioned related technologies and provide an electric support device that is thin, small in size and compact in the initial folded state, and has auxiliary support, large load and good support stability in the unfolded state.

[0006] The technical solution of this application is to provide an electric support device having the following structure: it includes...

[0007] The base frame has a sliding groove extending along its length, and the first end of the base frame is provided with a rotating connection point;

[0008] A support frame, the first end of which is connected to the rotating connection point, is used to allow the support frame to rotate about the rotating connection point to adjust the angle of the support frame relative to the base frame.

[0009] The first slider is slidably fitted within the groove.

[0010] An electric drive mechanism is connected to the first slider and is used to drive the first slider to slide back and forth along the length of the groove.

[0011] A support assembly includes a support rod and a guide block connected to a base frame. A first end of the support rod is rotatably connected to a first slider, and a second end of the support rod is connected to a pusher that contacts the back of the support frame. The guide block has a guide surface, wherein the guide surface is configured to guide the pusher to lift upward and cause the pusher to drive the support frame to rotate when the electric drive mechanism drives the first slider to move toward a rotational connection point near the base frame.

[0012] The assist component includes a second slider and at least one rotating joint. The second slider is slidably fitted within the groove. The first end of the rotating joint is rotatably connected to the pusher, and the second end of the rotating joint is rotatably connected to the second slider. During the upward lifting of the pusher, the first end of the rotating joint is lifted upward in conjunction with it, simultaneously driving the second slider to move towards the rotation connection point closer to the base frame. When the pusher is lifted upward to the first position, the second slider is stopped against its limit position. As the pusher continues to be lifted upward from the first position, the rotating joint provides assistance for the rotation of the support frame.

[0013] In some embodiments, the assist component includes multiple rotating joints, which are sequentially connected to form a rotating chain. A rotating mechanism is connected between adjacent rotating joints of the rotating chain. The rotating mechanism enables any one of the adjacent rotating joints to rotate in a single direction to have a maximum rotation angle. When the jacking member is lifted upward, it causes the first rotating joint to rotate upward to the maximum rotation angle, which in turn causes the second rotating joint to rotate upward. The second rotating joint provides an upward supporting force to the first rotating joint and assists in the rotation of the support frame. This process continues until the jacking member is lifted to the highest position, at which point the rotating chain as a whole forms the supporting force of the support frame.

[0014] In some embodiments, the rotating mechanism includes a rotating body that allows two adjacent rotating joints to be rotatably connected. The rotating body has a slot that engages with one of the rotating joints, and the rotating body has an outwardly protruding limiting portion that stops rotating when the rotating joint rotates to abut against the limiting portion.

[0015] In some embodiments, the maximum rotation angle is set to I, and 30 degrees ≤ I ≤ 60 degrees.

[0016] In some embodiments, the maximum rotation angle I is 45 degrees.

[0017] In some embodiments, when the support frame is in its lowest position, the rotating chain is arranged in a straight line within the groove.

[0018] In some embodiments, the guide block has an inclined surface that rises from low to high along a first direction of the slide groove, the inclined surface forming the guide surface; wherein, the first direction is the direction in which the first slider slides toward the rotational connection point of the base frame.

[0019] In some embodiments, the electric drive mechanism includes a drive motor and a lead screw that is rotatable along the length of the slide groove. The first slider is threadedly connected to the lead screw, and the circumferential rotation of the first slider is restricted by the slide groove. The drive motor is drivenly connected to the lead screw and is used to drive the lead screw to rotate so that the first slider slides.

[0020] In some embodiments, the jacking member includes a main shaft connected to the second end of the support rod and a roller connected to the main shaft, the outer edge of the roller abutting against the back of the support frame.

[0021] In some embodiments, a limiting block is connected in the groove at one end of the base frame near the rotation connection point, and the end of the limiting block near the second slider forms the extreme position of the second slider.

[0022] In summary, the electric support device of this application has the following advantages compared with related technologies:

[0023] When the electric drive mechanism of this electric support device drives the first slider to move along the length of the slide groove towards the rotational connection point near the base frame, the support rod moves synchronously with the first slider. Under the guidance of the guide surface of the guide block, the pusher at the second end of the support rod rises upward on the guide surface. At this time, the guide surface of the guide block provides initial assistance to the lifting of the pusher, and the second end of the support rod tilts or tilts upward, causing the pusher to drive the support frame to rotate, thus changing the angle of the support frame. During the process of the support rod driving the pusher to rise upward, the linkage rotary joint drives the second slider to move towards the rotational connection point near the base frame until the second slider is stopped at its limit position. As the pusher continues to rise upward, the rotary joint rotates and provides assistance to the rotation of the support frame. When the support frame of this electric support device rotates upward from its initial state, the guide surface of the guide block provides initial assistance, and as the pusher continues to rise, the rotary joint provides assistance to the rotation of the support frame. Therefore, this electric support device can provide multi-stage assistance to the rotation of the support frame, increasing the load of the support device. During the rotation and lifting of the support frame, both the guide block and the rotating joint can provide support for the back of the support frame. Therefore, the support frame has auxiliary support and good support stability when it is unfolded.

[0024] In addition, the electric support device adjusts the rotation angle of the support frame by sliding the first slider in the groove on the base frame to move the support rod, and avoids the second end of the support rod from connecting with the support frame. When the support frame is in the folded state, the support rod is set parallel to the groove, and the support frame is not affected by the installation angle of the support rod when it is folded. As a result, when the support frame is folded, the thickness between the support frame and the base frame is thin and the structure is compact, which makes the packaging volume of the electric support device small and the packaging and transportation costs low. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of an electric support device according to some embodiments of this application.

[0026] Figure 2 This is a schematic diagram of the assembly structure of an electric support device according to some embodiments of this application.

[0027] Figure 3 This is a structural schematic diagram of the support frame of an electric support device according to some embodiments of this application.

[0028] Figure 4 This is a cross-sectional structural schematic diagram of an electric support device according to some embodiments of this application.

[0029] Figure 5 Is Figure 4 A magnified schematic diagram of a portion of the structure.

[0030] Figure 6This is a schematic diagram of the structure of an electric support device according to some embodiments of this application, showing the jacking member in its initial state.

[0031] Figure 7 This is a schematic diagram of the structure of an electric support device according to some embodiments of this application, showing the pusher member being raised to a first position.

[0032] Figure 8 This is a schematic diagram of the internal structure of the base frame of an electric support device according to some embodiments of this application, showing the jacking member being raised to a first position.

[0033] Figure 9 This is a cross-sectional structural schematic diagram of the jacking member of an electric support device according to some embodiments of this application being raised to a first position.

[0034] Figure 10 This is a schematic diagram of the structure of an electric support device according to some embodiments of this application, showing the pusher member being raised to a second position.

[0035] Figure 11 This is a schematic diagram of the internal structure of a base frame in which the jacking member of an electric support device is raised to a second position according to some embodiments of this application.

[0036] Figure 12 This is a cross-sectional structural schematic diagram of the jacking member of an electric support device according to some embodiments of this application being raised to a second position.

[0037] Figure 13 This is a schematic diagram of the structure of an electric support device according to some embodiments of this application, showing the pusher member being raised to a third position.

[0038] Figure 14 This is a cross-sectional structural schematic diagram of the jacking member of an electric support device according to some embodiments of this application being raised to a third position.

[0039] Figure 15 This is a schematic diagram of the structure of an electric support device according to some embodiments of this application, showing the pusher member raised to the highest position.

[0040] Figure 16 This is a cross-sectional structural schematic diagram of the jacking member of an electric support device according to some embodiments of this application, raised to the highest position.

[0041] Figure 17 This is a schematic diagram of the connection structure of the rotating chain of an electric support device according to some embodiments of this application.

[0042] Figure 18 This is a side view of the rotating chain of an electric support device according to some embodiments of this application.

[0043] Figure 19 This is a schematic diagram of the assembly structure of the rotating chain of an electric support device according to some embodiments of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Support frame; 100. Outer frame; 101. Support plate; 102. Abutment part; 103. Hinge point; 2. Base frame; 200. Slide groove; 201. Rotation connection point; 3. First slider; 300. Second slider; 4. Electric drive mechanism; 400. Lead screw; 401. Drive motor; 402. Bearing; 5. Support rod; 6. Pushing part; 600. Roller; 601. Main shaft; 7. Guide block; 700. Guide surface; 8. Rotating chain; 800. Rotating joint; 801. Rotating mechanism; 802. Rotating body; 803. Slot; 804. Limiting part; 9. Limiting block. Detailed Implementation

[0046] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0047] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0048] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0050] See Figures 1-6 As shown;

[0051] This application discloses an electric support device for use in beds or seating furniture, such as a bed frame placed under a soft mattress or the bottom of a soft sofa cushion. Its structure includes a base frame 2, a support frame 1, and an electric drive mechanism 4. The base frame 2 is horizontally positioned and has a sliding groove 200 extending along its length. A rotating connection point 201 is provided at the first end of the base frame 2. The support frame 1 is positioned above the base frame 2, and its first end is connected to the rotating connection point 201, allowing the support frame 1 to rotate around the rotating connection point 201 to adjust the angle of the support frame 1 relative to the base frame 2. In this embodiment, the rotating connection point 201 can be a pivot, hinge pin, or rotating joint, used to connect the support frame 1 and the base frame 2, and allowing the angle of the support frame 1 relative to the base frame 2 to be rotatably adjusted. The support frame 1 directly contacts the bottom of the mattress or cushion, and when the support frame 1 rotates relative to the base frame 2, it can drive the mattress or cushion to rotate synchronously.

[0052] In this embodiment, as Figure 3 As shown, the support frame 1 includes an outer frame 100 and a support plate 101 connected to the top of the outer frame 100. The support plate 101 contacts the bottom of the mattress or cushion. There are two horizontal bars in the middle of the outer frame 100 that are arranged along the length of the support frame 1. The part between the two horizontal bars forms an abutment part 102 that is opposite to the sliding groove 200 on the base frame 2. A hinge point 103 is provided at the end of the support frame 1. The hinge point 103 is a connecting hole for connecting with the rotating connection point 201 on the base frame 2 via a rotating shaft.

[0053] In this embodiment, as Figure 2As shown, a first slider 3 is slidably fitted onto the slide groove 200. An electric drive mechanism 4 is driven by the first slider 3 and is used to drive the first slider 3 to reciprocate along the length of the slide groove 200. Specifically, the electric drive mechanism 4 can be a linear motor, a push rod motor, or other linear drive mechanism. However, in this embodiment, the electric drive mechanism 4 includes a drive motor 401 and a lead screw 400 that is rotatable along the length of the slide groove 200. The lead screw 400 is rotatably connected to the slide groove 200 via a bearing 402. The threaded hole on the first slider 3 is threadedly connected to the lead screw 400, and the circumferential rotation of the first slider 3 is restricted by the slide groove 200. The drive motor 401 is driven by the lead screw 400 and is used to drive the lead screw 400 to rotate, causing the first slider 3 to slide. It is well known that the drive motor 401 is a DC motor, and the output end of the drive motor 401 is driven by the lead screw 400 via a reduction gearbox. In this embodiment, to make the sliding of the first slider 3 smoother and reduce the friction between it and the groove 200, a protruding rib is provided on the outer side wall of the first slider 3. The length direction of the rib is consistent with the sliding direction of the first slider 3. The rib reduces the contact area between the first slider 3 and the groove 200, thereby making the sliding of the first slider 3 smoother and quieter. In this embodiment, the drive motor 401 is located on the outside of the base frame 2 and is installed at one end of the base frame 2.

[0054] In this embodiment, the electric support device further includes a support component and an assist component, such as... Figure 2As shown, the support assembly includes a support rod 5 and a guide block 7 connected to the base frame 2. The first end of the support rod 5 is rotatably connected to the first slider 3, and the second end of the support rod 5 is connected to a pusher 6 that contacts the back of the support frame 1. The guide block 7 has a guide surface 700, wherein the guide surface 700 is configured such that when the electric drive mechanism 4 drives the first slider 3 to move towards the rotation connection point 201 near the base frame 2, it guides the pusher 6 to rise upward and causes the pusher 6 to drive the support frame 1 to rotate. When the first slider 3 drives the support rod 5 to move synchronously, due to the setting of the guide block 7, the pusher 6 at the second end of the support rod 5 can be raised upward along the guide surface 700, causing the second end of the support rod 5 to tilt upward. The assist component includes a second slider 300 and at least one rotating joint 800. The second slider 300 is slidably fitted in the slide groove 200 and is positioned in the slide groove 200 near the rotating connection point 201 of the base frame 2. The first end of the rotating joint 800 is rotatably connected to the pusher 6, and the second end of the rotating joint 800 is rotatably connected to the second slider 300. During the upward lifting of the pusher 6, the first end of the rotating joint 800 is lifted upward, simultaneously driving the second slider 300 to move towards the rotating connection point 201 of the base frame 2. When the pusher 6 is lifted upward to the first position, the second slider 300 is stopped against its limit position. As the pusher 6 continues to be lifted upward from the first position, the rotating joint 800 provides assistance for the rotation of the support frame 1.

[0055] It is not difficult to understand that, in this embodiment, as Figure 4 and Figure 5 As shown, when the support frame 1 is in its lowest folded position or horizontal position, the guide block 7 is located in front of and corresponds to the pusher 6; the guide surface 700 of the guide block 7, that is, the guide block 7 has an inclined surface that rises from low to high along the first direction of the slide groove 200, and the inclined surface forms the guide surface 700; wherein, the first direction is the direction in which the first slider 3 slides towards the rotation connection point 201 of the base frame 2. When the pusher 6 is in its initial position, the support rod 5 is parallel to the slide groove 200, and the pusher 6 is exactly at the low position of the guide surface 700.

[0056] See Figure 7 , Figure 8 and Figure 9As shown, in this embodiment, when the electric drive mechanism 4 drives the first slider 3 to lift the pusher 6 from its initial position to the first position, the pusher 6 rises from the low position of the guide surface 700 of the guide block 7 to the high position of the guide surface 700. Simultaneously, the second slider 300 moves towards the rotation connection point 201 near the base frame 2 to its limit position and is then stopped. At this time, as the pusher 6 continues to rise under the action of the support rod 5 and the first slider 3, it can drive the first end of the rotation joint 800 to rotate upwards, thereby providing upward assistance to the pusher 6 and causing it to rise. The limit position of the second slider 300 refers to the fact that a limiting block 9 is connected in the groove 200 at one end of the base frame 2 near the rotation connection point 201. The end of the limiting block 9 near the second slider 300 forms the limit position of the second slider 300. In other words, the second slider 300 is stopped when it moves to abut against the limiting block 9.

[0057] In this embodiment, as Figure 4 The push block is shown in its initial or lowest position, and as shown in the following states: Figure 9 As shown in the state of the push block in the first position, when the electric drive mechanism 4 of the electric support device drives the first slider 3 to move along the length of the slide groove 200 towards the rotation connection point 201 near the base frame 2, the support rod 5 moves synchronously with the first slider 3. Under the guidance of the guide surface 700 of the guide block 7, the push member 6 at the second end of the support rod 5 is lifted upward on the guide surface 700. At this time, the guide surface 700 of the guide block 7 provides initial assistance for the lifting of the push member 6, and the second end of the support rod 5 tilts or tilts upward and causes the push member 6 to drive the support frame 1 to rotate, thereby changing the angle of the support frame 1. During the process of the support rod 5 driving the push member 6 to lift upward, the linkage rotation joint 800 drives the second slider 300 to move towards the rotation connection point 201 near the base frame 2 until the second slider 300 is stopped against its limit position. When the push member 6 continues to lift upward, the rotation joint 800 rotates and provides assistance for the rotation of the support frame 1.

[0058] Furthermore, when the support frame 1 of the electric support device rotates upward from its initial state, the guide surface 700 of the guide block 7 provides initial assistance, and as the pusher 6 continues to lift, the rotating joint 800 provides assistance for the rotation of the support frame 1. Therefore, the electric support device can provide multi-stage assistance for the rotation of the support frame 1, increasing the load capacity of the support device. During the rotation and lifting process of the support frame 1, both the guide block 7 and the rotating joint 800 can provide support for the back of the support frame 1. Therefore, the support frame 1 has assisted support and good support stability in its unfolded state.

[0059] Additionally, in this embodiment, as Figure 1 and Figure 4As shown, the electric support device adjusts the rotation angle of the support frame 1 by sliding the first slider 3 in the slide groove 200 on the base frame 2 to move the support rod 5, and avoids the second end of the support rod 5 from connecting with the support frame 1. When the support frame 1 is in the folded state, the support rod 5 is arranged parallel to the slide groove 200. The support frame 1 is not interfered with by the installation angle of the support rod 5 when it is folded. Therefore, when the support frame 1 is in the folded state, the thickness between the support frame 1 and the base frame 2 is thin and the structure is compact, which makes the packaging volume of the electric support device small and the packaging and transportation costs low.

[0060] In some embodiments, such as Figures 10-19 As shown, the power assist assembly includes multiple rotating joints 800, each of which is a rotating plate with hinge holes at both ends. The multiple rotating joints 800 are connected in sequence to form a rotating chain 8. When the support frame 1 is in its lowest position or the pusher 6 is in its initial state, the rotating chain 8 is arranged in a straight line within the slide groove 200. When the support frame 1 is in its lowest position, the rotating chain 8 does not interfere with the thickness between the support frame 1 and the base frame 2, thereby making the structure of the electric support device more compact after folding.

[0061] In this embodiment, a rotating mechanism 801 is connected between two adjacent rotating joints 800 of the rotating chain 8. The rotating mechanism 801 enables any one of the two adjacent rotating joints 800 to have a maximum rotation angle when rotating in a single direction. When the pusher 6 is lifted upward, it drives the first rotating joint to rotate upward to the maximum rotation angle, which in turn drives the second rotating joint to rotate upward. The second rotating joint provides an upward supporting force to the first rotating joint and provides assistance to the rotation of the support frame 1. This process continues until the pusher 6 is lifted to the highest position. The rotating chain 8 as a whole forms the supporting force of the support frame 1.

[0062] Specifically, in this embodiment, there are three rotating joints 800. When the pusher 6 is lifted upward, it causes the first rotating joint to rotate upward to its maximum rotation angle, which in turn causes the second rotating joint to rotate upward. At this time, the second rotating joint provides an upward supporting force to the first rotating joint. When the pusher 6 continues to be lifted upward, it simultaneously causes the first and second rotating joints to rotate upward. The first and second rotating joints together provide assistance for the pusher 6 or the support frame 1 to rise. When the second rotating joint rotates upward to its maximum rotation angle, it in turn causes the third rotating joint to rotate upward. At this time, the third rotating joint provides an upward supporting force to the first and second rotating joints. When the pusher 6 continues to be lifted upward, it simultaneously causes the first, second, and third rotating joints to rotate upward synchronously. The first, second, and third rotating joints together provide assistance for the pusher 6 or the support frame 1 to rise. Therefore, when the jacking member 6 is lifted upwards and drives the support frame 1 to rotate and adjust the angle, each rotating joint 800 of the rotating chain 8 provides assistance to the jacking member 6 to lift upwards in sequence, so that the assistance provided by the rotating chain 8 to the support frame 1 is continuous and uninterrupted, making the rotation of the support frame 1 more stable.

[0063] In this embodiment, the rotation mechanism 801 ensures that either of two adjacent rotation joints 800 has the maximum rotation angle when rotated in a single direction. The rotation mechanism 801 is as follows: Figure 17 , Figure 18 and Figure 19 As shown, the rotating mechanism 801 includes a rotating body 802, which rotatably connects two adjacent rotating joints 800. The rotating body 802 has a slot 803 that engages with one of the rotating joints 800. The rotating body 802 also has a protruding limiting part 804, which stops rotating when the rotating joint 800 abuts against the limiting part 804. Specifically, in the initial state, the angle between the two adjacent rotating joints 800 is 0 degrees. When one of the rotating joints 800 rotates upwards, it abuts against the limiting part 804 of the rotating body 802 when it rotates to 1 degree, thus stopping the rotation. Therefore, 1 degree is set as the maximum rotation angle, and the maximum rotation angle 1 is set within the range of 30 degrees ≤ 1 ≤ 60 degrees. When the maximum rotation angle I is 30 degrees, the rotating joint 800 can provide good support for the pushing member 6, and the rotating joints 800 can also meet the requirements for stable support. When the maximum rotation angle I is 60 degrees, the rotating joint 800 can provide moderate support for the pushing member 6, and the rotating joints 800 can also meet the requirements for stable support. Specifically, in this embodiment, the maximum rotation angle I is 45 degrees. At this time, the rotating joint 800 can provide greater support for the pushing member 6, and the rotating joints 800 can meet the requirements for stable support.

[0064] See Figure 11 and Figure 12 As shown, when the electric drive mechanism 4 drives the first slider 3 to lift the pusher 6 from the first position to the second position, the first rotating joint and the second rotating joint rotate to the maximum rotation angle. If the pusher 6 continues to be lifted upward from the second position, the first rotating joint can be linked with the second rotating joint to rotate upward.

[0065] See Figure 13 and Figure 14 As shown, when the electric drive mechanism 4 drives the first slider 3 to lift the pusher 6 from the second position to the third position, the second and third rotating joints rotate to the maximum rotation angle. If the pusher 6 continues to rise from the third position, the second rotating joint can rotate upward in conjunction with the third rotating joint.

[0066] See Figure 15 and Figure 16 The image shows the pusher 6 raised to its maximum height, at which point the first, second, and third rotating joints together provide support for the pusher 6.

[0067] In this embodiment, the first position, the second position, the third position, and the maximum height position of the pusher 6 when the support frame 1 rotates to the maximum angle all refer to the height position of the pusher 6 relative to the base frame 2, or different positions of the support frame 1 relative to the base frame 2. The height of the second position is greater than the height of the first position, the height of the third position is greater than the height of the second position, and the height of the highest position of the pusher 6 when the support frame 1 rotates to the maximum angle is greater than the height of the third position. Therefore, when the support frame 1 of the electric support device is raised from the lowest position to the first position, the guide provides initial assistance to the rotation of the support frame 1; when the support frame 1 is raised from the first position to the second position, the first rotating joint provides first-level assistance to the rotation of the support frame 1; when the support frame 1 is raised from the second position to the third position, the first and second rotating joints together provide second-level assistance to the rotation of the support frame 1; when the support frame 1 is raised from the third position to the maximum height position, the first, second, and third rotating joints together provide third-level assistance to the rotation of the support frame 1; and the assistance at each level is continuous with each other. Therefore, the electric support device increases the load on the support frame 1, and the support stability is good throughout the entire deployment process of the support frame 1.

[0068] It is easy to understand that when the rotating joint 800 is linked to the second slider 300 and slides in the groove 200, the second slider 300 guides the movement of the rotating joint 800 or the rotating chain 8, and also prevents the rotating joint 800 or the rotating chain 8 from detaching from the groove 200 of the base frame 2, thus improving structural stability and safety.

[0069] In some embodiments, such as Figure 2 As shown, the pusher 6 includes a main shaft 601 connected to the second end of the support rod 5 and a roller 600 connected to the main shaft 601. The outer edge of the roller 600 abuts against the abutment portion 102 on the back of the support frame 1. When the roller 600 of the pusher 6 pushes the support frame 1 to rotate, the roller 600 can roll on the abutment portion 102 on the back of the support frame 1 to reduce friction.

[0070] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0071] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the claims.

Claims

1. An electric support device, characterized in that: It includes The base frame has a sliding groove extending along its length, and the first end of the base frame is provided with a rotating connection point; A support frame, the first end of which is connected to the rotating connection point, is used to allow the support frame to rotate about the rotating connection point to adjust the angle of the support frame relative to the base frame. The first slider is slidably fitted within the groove. An electric drive mechanism is connected to the first slider and is used to drive the first slider to slide back and forth along the length of the groove. A support assembly includes a support rod and a guide block connected to a base frame. A first end of the support rod is rotatably connected to a first slider, and a second end of the support rod is connected to a pusher that contacts the back of the support frame. The guide block has a guide surface, wherein the guide surface is configured to guide the pusher to lift upward and cause the pusher to drive the support frame to rotate when the electric drive mechanism drives the first slider to move toward a rotational connection point near the base frame. The assist component includes a second slider and at least one rotating joint. The second slider is slidably fitted within the groove. The first end of the rotating joint is rotatably connected to the pusher, and the second end of the rotating joint is rotatably connected to the second slider. During the upward lifting of the pusher, the first end of the rotating joint is lifted upward in conjunction with it, simultaneously driving the second slider to move towards the rotation connection point closer to the base frame. When the pusher is lifted upward to the first position, the second slider is stopped against its limit position. As the pusher continues to be lifted upward from the first position, the rotating joint provides assistance for the rotation of the support frame.

2. The electric support device according to claim 1, characterized in that: The assist component includes multiple rotating joints, which are connected in sequence to form a rotating chain. A rotating mechanism is connected between two adjacent rotating joints of the rotating chain. The rotating mechanism enables any one of the two adjacent rotating joints to have the maximum rotation angle when rotating in a single direction. When the jacking member is lifted upward, it causes the first rotating joint to rotate upward to the maximum rotation angle, which in turn causes the second rotating joint to rotate upward. The second rotating joint provides upward support to the first rotating joint and assists in the rotation of the support frame. This process continues until the jacking member is lifted to the highest position. The entire rotating chain then forms the supporting force for the support frame.

3. The electric support device according to claim 2, characterized in that: The rotating mechanism includes a rotating body that allows two adjacent rotating joints to be rotatably connected. The rotating body is provided with a slot that engages with one of the rotating joints. The rotating body is also provided with an outwardly protruding limiting part that stops rotating when the rotating joint rotates to abut against the limiting part.

4. The electric support device according to claim 2, characterized in that: The maximum rotation angle is set to I, and 30 degrees ≤ I ≤ 60 degrees.

5. The electric support device according to claim 4, characterized in that: The maximum rotation angle I is 45 degrees.

6. The electric support device according to claim 2, characterized in that: When the support frame is in its lowest position, the rotating chain is arranged in a straight line within the slide groove.

7. The electric support device according to claim 1, characterized in that: The guide block has an inclined surface that rises from low to high along a first direction of the slide groove, and the inclined surface forms the guide surface; wherein, the first direction is the direction in which the first slider slides toward the rotation connection point of the base frame.

8. The electric support device according to claim 1, characterized in that: The electric drive mechanism includes a drive motor and a lead screw that is rotatable along the length of the slide groove. The first slider is threadedly connected to the lead screw, and the circumferential rotation of the first slider is restricted by the slide groove. The drive motor is driven to the lead screw and is used to drive the lead screw to rotate so that the first slider slides.

9. An electric support device according to claim 1, characterized in that: The jacking component includes a main shaft connected to the second end of the support rod and a roller connected to the main shaft, with the outer edge of the roller abutting against the back of the support frame.

10. An electric support device according to claim 1, characterized in that: A limiting block is connected in the groove at one end of the base frame near the rotation connection point, and the end of the limiting block near the second slider forms the extreme position of the second slider.

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